Wilt Diseases of Black Pepper
| dc.contributor.author | Nambiar, K.K.N. | |
| dc.contributor.author | Sarma, Y.R. | |
| dc.date.accessioned | 2014-08-20T10:53:54Z | |
| dc.date.available | 2014-08-20T10:53:54Z | |
| dc.date.issued | 1977 | |
| dc.description.abstract | Among the major diseases affecting black pepper, foot rot (quick wilt) and pepper yellows (slow wilt) are important, inflicting heavy losses in plantations. Foot rot is caused by Phytophthora palmivora and is characterised by rotting of collar and/or root and leaf, die back of twigs and spike shedding. The disease incidence is generally high when relative humidity is high (91-99%) and temperature is low (19-23°C). The nature of spread supports the view th*t it is mainly through soil and water. Heavy rainfall and wind contribute to aerial spread leading to foliar infections. The pathogen has got a wide host range. Its mode of perennation, population build up during different seasons and primary infections are areas requiring investigations. Existence of difference in virulence in the pathogen cannot be ruled out. Piper colubrinum, P. obliquum, and P. guineense are reported to be resistant to the pathogen. No effective curative control measures have so far been evolved against the disease.- The importance of evolving resistant Jines and adoption of management practices in conjunction with chemical treatment is indicated in developing control schedules. In the case of slow wilt, involvement of fungi like Fusarium sp.,Rhizoctoniasp. and ne-matodes like Radopholus similis and Meloidogyne incognita is indicated. The importance of deficiencies of K and P and soil water stress in the incidence of disease also has been stressed. Effective measures have not been worked out so far. Extensive screening is to be taken up for locating resistance to this disease. | en_US |
| dc.identifier.citation | J.Plantn.Crops 1977 v-5 i-2 p-92-103 | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/4902 | |
| dc.language.iso | en | en_US |
| dc.title | Wilt Diseases of Black Pepper | en_US |
| dc.type | Article | en_US |